htjbbard



' M. G. HUBBARD.

Carriage-Spring.

No. 12,910. Patented May 22, 1855.

lnventon AM. PHOTU-LITHO. CO NXXOSBURNE'S PROCESS) UNITED STATES PATENT OFFICE.

M. G. HUBBARD, OF NEW YORK, N. Y.

CARRIAGE-SPRING.

Specification of Letters Patent No. 12,910, dated May 22, 1855.

To all whom, it may concern:

Be it known that I, M. G. HUBBARD, of the city, county, and State of New York, have invented a certain new and useful Spring for Light Carriages; and I do hereby declare the following to be a full, clear, and exact description thereof, reference being had to the accompanying drawing in which Figure 1, is a plan of the underside of a carriage, with the springs attached; Fig. 2, is a front view of the carriage and springs.

The nature of my invention is the employment of the torsion of a bar of wood or metal, applied substantially as described to a carriage as a spring.

The construction is as follows: If I employ a bar of wood for a spring, I lay one along under each side of my carriage body, as at (a, a) to the rear ends of these bars I affix arms (1)) at right angles thereto; these may be of any suitable material; and by forming a square hole in the end thereof, the square end of the bar can be inserted; the position of these arms is at an inclined angle downward and outward, as clearly seen in Fig. 2; the ends rest on or are jointed to the hind axle (0); similar arms to those just described are affixed in the same manner to the forward ends of the bars (a), but they incline inward and downward, as at (d), Fig. 2, and are jointed to the head block or bolster (6), over the forward axle; the bars are permanently attached to the body of the carriage, at their center, and have a plays in clips at each end.

If metal is used instead of wood, for the springs, the ends may be bent to form the arms, and the same result will be effected.

The head block (6), it will be seen by this arrangement, can have a vibration and elasticity of movement which I have never before seen effected; although swivels have sometimes been made in carriage perches for that purpose.

Having thus described my new carriage spring fully, what I claim therein as new, and for which I desire to secure by Letters Patent, is

The employment of a bar extending under the carriage, substantially as herein described, which, by its torsion acts as a spring in the manner and for the purpose set forth.

l/VM. GREENOUGH, J. C. GREENOUGH. 

